Not that you are likely to make this mistake, watch out for figures that seem 'bigger than they should be'. A dodgy company made molds of the Combaticons and used similar colours but they were huge and made of an incredibly crappy plastic. They were often found in $2 shops (I found a Blast Off in a really bad Transformers knock-off show bag at the Melbourne show a decade ago) and some people still try to flog them on ebay where scale can be hard to judge.